C / C++ / MFC

displaying png's with GDI+

31-May-07 5:27

tom groezer wrote:
Why is is that the default setting is set to unicode

what is your problem exactly ? what would you have prefered instead ? ...and why ?

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Adno31-May-07 4:58

Adno

31-May-07 4:58

hi im trying to get my head around GDI+ as far as i can tell i can only use it in the main function.
With what i've done below the image shows up at first but when the window refreshes i.e (change the size of it)
the image disappears is not repainted.

main..

GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
{
Graphics graphics(GetDC(hwnd));
Image* image = new Image(L"clock2alpha.png");

Bitmap bitmap(L"clock2alpha.png");
graphics.DrawImage(&bitmap, 0, 0);
}
GdiplusShutdown( gdiplusToken );

.....

im interested in displaying png images and how to access them outside the main method with GDI+

thank you

Jun Du31-May-07 5:09

Jun Du

31-May-07 5:09

Because your code doesn't have a re-painting mechanism. The drawing code should be placed in a OnPaint() or OnDraw() handler, regardless of GDI or GDI+ rendering.

Best,
Jun

Mark Salsbery31-May-07 6:15

Mark Salsbery

31-May-07 6:15

Lamefif wrote:
as far as i can tell i can only use it in the main function.

Where did you get that idea? Smile | :)

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Adno31-May-07 15:04

Adno

31-May-07 15:04

hey Mark

i dont know what i did earlier but it keept crashing at runtime, when i put the code above in a method it was weird.

thank for your replies guys.

Mark Salsbery31-May-07 15:16

Mark Salsbery

31-May-07 15:16

Lamefif wrote:
keept crashing at runtime, when i put the code above in a method

hmm It was something else probably.

You can make GDI+ calls anywhere (of course, all the usual thread safety issues apply if you're
using multiple threads).

If you're using GDI+ extensively, you can do the GdiplusStartup() just once - main/winmain is
fine - and call GdiplusShutdown() just once after all drawing is done - just before returning
from main/winmain is fine.

If you have trouble in other functions you can always post related sample code here Smile | :)

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

How to Upload (.doc) file in MySQL Database

Hamid_RT31-May-07 18:39

Hamid_RT

31-May-07 18:39

Whats the error and where you used your code?

WhiteSky

Y_Kaushik31-May-07 4:45

Y_Kaushik

31-May-07 4:45

Hi Actually i have already ask this question but not get any setisfactory
ans.

My problem is that i want to upload a .doc file in mysql database ,
i am making my application in VC++ 60. Modal Dialog based(type)

It should be work like whenever we upload our resume in any job site.
problem is that in VC++ there is not any file field(in which a browse button is already atteched)

I use a button and write code for it to open window but using it
we can select only file name not whole path

Please any one told me how i can solve this problem

Regard's
Kaushik

Re: How to Upload (.doc) file in MySQL Database

David Crow31-May-07 5:03

David Crow

31-May-07 5:03

Your table will need to contain a blob-type field. You would then copy the file's bytes to this field just like you would any other field. The fact that the bytes come from a file is irrelevant.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

hiding a console app

Rage31-May-07 4:04

31-May-07 4:04

Hi,

I have a console app that is called by another program. I would like my console app to run hidden, is there a way to achieve this ?

Thanks

Constantly "Saving the day" should be taken as a sign of organizational dysfunction rather than individual skill - Ryan Roberts[^]

toxcct31-May-07 4:12

31-May-07 4:12

::ShellExecute(NULL, "open", "theprog.exe", NULL, NULL, <code>SW_HIDE</code>);

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Rage31-May-07 4:22

31-May-07 4:22

Thanks tox, but I cannot modify the call to the console app (otherwise I would have done what you said, trivial, of course). I must hide the console app from within the app directly.

Constantly "Saving the day" should be taken as a sign of organizational dysfunction rather than individual skill - Ryan Roberts[^]

toxcct31-May-07 4:28

31-May-07 4:28

a console program cannot hide itself unfortunately (not that easily AFAIK at least)

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Rage31-May-07 5:22

31-May-07 5:22

Je le savais. C'etait juste pour persuader un collègue qui ne voulait pas me croire Roll eyes | :rolleyes:

Constantly "Saving the day" should be taken as a sign of organizational dysfunction rather than individual skill - Ryan Roberts[^]

toxcct31-May-07 5:24

31-May-07 5:24

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Matthew Faithfull31-May-07 5:04

Matthew Faithfull

31-May-07 5:04

If you have control of the Console App end you could make it a fake Console App i.e. make it a Windows App but don't create any Windows just use AllocConsole if and when you do want a Console to appear.
The difference between the two is just a setting in the PE Header stuff on the front of your executable which is picked up by the C Runtime to determine it's mode setting. If it determines it's bootstrapping a Console App it allocates a Console otherwise it doesn't. There are other differences, in IO for example, but they all boil down to different paths in the startup code of the CRT. There's nothing, for example, to stop a Console App creating Windows and doing GUI stuff. In fact many DirectX games are done this way. They start out running as Console Apps and bootstrap DirectX from there to take over the entire screen.;) Equally A Windows app may have no actual Windows and could even have a Console if it decides to create one. I do this lot for scratch/testing type apps.

Nothing is exactly what it seems but everything with seems can be unpicked.

Rage31-May-07 5:22

31-May-07 5:22

Matthew Faithfull wrote:
Equally A Windows app may have no actual Windows and could even have a Console if it decides to create one.

This sounds interesting. How would you call a console from a win32 app ?

Constantly "Saving the day" should be taken as a sign of organizational dysfunction rather than individual skill - Ryan Roberts[^]

Matthew Faithfull31-May-07 5:49

Matthew Faithfull

31-May-07 5:49

First off you need to get yourself a Console and then you can use stdin and stdout as normal. Have a look here http://msdn2.microsoft.com/en-us/library/ms682528.aspx[^]
or you can use API calls like

BOOL WINAPI ReadConsole( HANDLE hConsoleInput, LPVOID lpBuffer, DWORD nNumberOfCharsToRead, LPDWORD lpNumberOfCharsRead, LPVOID pInputControl );

I have a pretty much complete wrapper class for the Console API functions which I may post on CP at some point if anyone's interested.;)

Nothing is exactly what it seems but everything with seems can be unpicked.

Displaying help popup under the control in VC++

tom groezer31-May-07 5:24

tom groezer

31-May-07 5:24

What do you mean when you say cthe following

If you have control of the Console App end you could make it a fake Console App i.e. make it a Windows App but don't create any Windows just use AllocConsole if and when you do want a Console to appear.

I guess using ShellExecute shall serve the purpose.

Merryla Martina31-May-07 3:49

Merryla Martina

31-May-07 3:49

Hi All,

I have created an application in vc++ using the Appwizard with some dialog in it but without help support.
Now I am in need of providing help msg for the controls in the dialog.So later added support for the help.
Somehow managed to provide the help popup using WinHelp.

Currently I am able to get the help popup message at the cursor position .
But I need to display it near the control, not at the cursor position.

FYI The code looks like this

//InputDialog.h

afx_msg BOOL OnHelpInfo(HELPINFO* pHelpInfo);

//InputDialog.cpp

BEGIN_MESSAGE_MAP(InputDialog, CDialog)
ON_WM_HELPINFO()
END_MESSAGE_MAP()

BOOL InputDialog::OnHelpInfo(HELPINFO* pHelpInfo)
{
// TODO: Add your message handler code here and/or call default

CRect Rect;
CPoint XPoint,YPoint,CtrlPoint;

CWnd* pControl = GetDlgItem( pHelpInfo->iCtrlId );

//Get the coordianate of the control -Example Radio button in the Dialog

pControl->GetClientRect(&Rect);
pControl->ClientToScreen(&Rect);

XPoint=Rect.TopLeft();
YPoint=Rect.BottomRight();

CtrlPoint.x = XPoint.x;
CtrlPoint.y = YPoint.y;

//Assign the control coordinate to the mouse Position
pHelpInfo->MousePos = CtrlPoint;

DWORD dwContextID = pControl->GetWindowContextHelpId();

//Only proceed if it's not a static control
if (cControlID != 65535) //65535 is IDC_STATIC
{
AfxGetApp()->WinHelp( dwContextID ,HELP_CONTEXTPOPUP);
}

return CDialog::OnHelpInfo(pHelpInfo);
}

Also, I am not sure whether the GetClientRect together with ClientToScreen returns the control screen coordinate.

Please, can anybody help me ?

Thanks
Martina

TranslateAccelerator doubt

tom groezer31-May-07 3:36

tom groezer

31-May-07 3:36

Below is the stub of code that is found on MSDN.

MSG msg;<br />
BOOL bRet;<br />
<br />
while ( (bRet = GetMessage(&msg, (HWND) NULL, 0, 0)) != 0)<br />
{<br />
    if (bRet == -1) <br />
    {<br />
        // handle the error and possibly exit<br />
    }<br />
    else<br />
    { <br />
        // Check for accelerator keystrokes. <br />
     <br />
        if (!TranslateAccelerator( <br />
                hwndMain,      // handle to receiving window <br />
                haccel,        // handle to active accelerator table <br />
                &msg))         // message data <br />
        {<br />
            TranslateMessage(&msg); <br />
            DispatchMessage(&msg); <br />
        } <br />
    } <br />
}

Please refer to the above code. The TranslateAccelerator function compares the keystokes it receives to the accelator table and if there is a match then it posts the message(WM_COMMAND and WM_SYSCOMMAND) to the the window procedure to get processes. It returns only after successful processing of the message. MSDN says that if TranslateAccelerator fails then it returns 0. In that case the above if condition is satisfies. I see a error above. Does anybody has any view on the same?

The link to the same is:-
http://msdn2.microsoft.com/en-us/library/ms646337.aspx[^]

Calling the Translate Accelerator Function

Re: TranslateAccelerator doubt

toxcct31-May-07 3:40